How to find IP Adress of a computer using C#

How to find IP Adress of a computer using C#

using System;

using System.Windows.Forms;

using System.Net;

namespace WindowsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            try

            {

                IPHostEntry hostname = Dns.GetHostByName(textBox1.Text );

                IPAddress[] ip = hostname.AddressList;

                textBox2.Text  = ip[0].ToString();

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex.ToString());

            }

        }

    }

}